// Copyright (c) Appeon. All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. 
// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.

using System;
using System.Collections.Generic;
using System.Data;
using IBM.Data.DB2.Core;
using JetBrains.Annotations;

namespace SnapObjects.Data.DB2
{
    internal class DB2AdoDbCommand : AdoDbCommand
    {
        public DB2AdoDbCommand(
            [NotNull] string sqlText,
            IEnumerable<IAdoDbParameter> parameters,
            bool addExceptionToTransaction,
            CommandType commandType = CommandType.Text)
            : base(sqlText, parameters, addExceptionToTransaction, commandType)
        {

        }

        protected override string BuildNoExecCommandText(DataContext context, string commandText)
        {
            return $@"EXPLAIN PLAN FOR {commandText};";
        }

        protected override int GetSqlDbCode(Exception innerException)
        {
            if (innerException is DB2Exception ex)
            {
                if (ex.Errors.Count > 0)
                {
                    return ex.Errors[0].NativeError;
                }
            }

            return -1;
        }
    }
}
